Lucent Technologies MERLIN LEGEND Release 5.0 Feature Reference page 502

MERLIN LEGEND Communications System Release 5.0
Feature Reference 555-650-110
Features
Primary Rate Interface (PRI) and T1
NOTE:
Most local exchange carriers (LECs) do not offer multiple telephone
numbers associated with a single channel. Therefore, routing by dial plan
can route calls only to a single data extension for each single telephone
number provided by the local exchange carrier central office.
The three settings in the Incoming Routing Table are as follows:
Expected Digits. The number of digits sent from the service provider.
Digit Addition. Digits are added to the beginning of the digits.
Digit Deletion. Digits are deleted from the end of the digits.
An example Incoming Routing Table is shown in
Table 36.
Entry
Service
Expected Digits
Example #
Digit deletion
Digit addition
Extension
Systemwide Programming Options
Clock Synchronization
Clock synchronization is an arrangement in which digital facilities operate from a
common clock. Whenever digital signals are transmitted over a communications
link, the receiving end must be synchronized with the transmitting end to receive
the digital signals without errors.
The system synchronizes itself by extracting the timing signal from the incoming
digital stream. If the system has one 100D module, that module provides its own
primary synchronization. If the system has at least one 800 NI-BRI module, more
than one 100D module, or a combination of 100D modules and 800 NI-BRI
modules, then one of the connections provides primary clock synchronization for
all 800 NI-BRI and 100D module ports and for the system's time-division
multiplexing (TDM) bus. The primary clock synchronization source must be
identified during system programming. The factory setting either is the first 100D
module or the first port on the first 800 NI-BRI module in the carrier. This can be
changed through system programming.
Sample T1 Switched 56 Dial-Plan Routing Table
1 2
T1 S56 T1 S56
3 3
234 235
1 1
[none] [none]
34 35
Table 36.
3 4 ...
T1 S56
3
300
1
67
6700
3 6
Issue 1
June 1997
Page 470
24
T1 S56
3
492
1
69
6992
3 6